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首页> 外文期刊>Materials Science and Engineering >Influence of TiB_2 particles on aging behavior of in-situ TiB_2/Al-4.5Cu composites
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Influence of TiB_2 particles on aging behavior of in-situ TiB_2/Al-4.5Cu composites

机译：TiB_2颗粒对原位TiB_2 / Al-4.5Cu复合材料时效行为的影响

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摘要

In this paper, the aging process of in-situ TiB2/Al-4.5Cu composites has been investigated carefully, especially the precipitation behavior in the presence of TiB2particles. The mechanism of this particle-assisted precipitation in the composites are also studied systemically. Comparisons of the aging behavior between composites and matrix alloy have been made to investigate the effect of TiB2particles. Moreover, attention has also been paid to tensile properties and hardness of TiB2/Al-4.5Cu composites and matrix alloy during aging procedure. Results indicate that TiB2particles accelerate the aging processes and also induce inhomogeneous distribution of Al2Cu precipitates due to the high-density dislocations adjacent to particles. Besides, a rare phenomenon was found that the evolution on mechanical properties of the composites can be divided into two stages and this evolution is in good accordance with the evolution of the Al2Cu precipitates. Moreover, the time to peak-aged condition of the composites in mechanical properties comes down from 20 h to 8 h.
机译：本文仔细研究了原位TiB2 / Al-4.5Cu复合材料的时效过程，特别是在TiB2颗粒存在下的沉淀行为。还对复合物中这种颗粒辅助沉淀的机理进行了系统的研究。比较了复合材料和基体合金的时效行为，以研究TiB2颗粒的影响。此外，在时效过程中，还关注了TiB2 / Al-4.5Cu复合材料和基体合金的拉伸性能和硬度。结果表明，TiB2颗粒加速了时效过程，并且由于与颗粒相邻的高密度位错而引起了Al2Cu沉淀的不均匀分布。此外，还发现了一种罕见的现象，即复合材料的力学性能演化可以分为两个阶段，并且该演化与Al2Cu析出物的演化非常吻合。而且，复合材料达到机械性能的峰值时效时间从20 h降至8 h。

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  • 来源
    《Materials Science and Engineering》 |2018年第4期|244-250|共7页
  • 作者

    Rui Du; Qi Gao; Shusen Wu; Shulin Lü; Xiong Zhou;

  • 作者单位

    State Key Lab of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology;

    State Key Lab of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology;

    State Key Lab of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology;

    State Key Lab of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology;

    State Key Lab of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Metal matrix composites; Aging behavior; TiB2particles; Al2Cu precipitates; Mechanical properties;

    机译：金属基复合材料;时效行为;TiB2颗粒;Al2Cu析出物;力学性能;

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